Alishtar's Aura of Stars

You call the dazzling lights of the sky to your aid, encircling and protecting and individual you touch. You surround the creature with four balls of star light. Until the spell ends, the creature sheds bright light in a 20-foot radius and dim light for an additional 20 feet. The color of the balls of light is your choice. When the creature takes damage from an attack, they may reduce the damage by 1d8. After doing so, one of the balls of light blink out. This spell ends once all balls of light are dimmed. 

When you cast this spell using a spell slot of 3rd level or higher, you summon two additional balls of light per spell level above 2nd.